Diamino benzyl alcohols and process for making same



Patented F eb. 17, 1942 umrso' STATES PATENT? OFFICE v nramh'o as n zgrgligo r mraooass I Jerse y No'Drawing'. Application April 21, 1939,

, Serial N0. 289,218

I s Claims. (01. zen-474 'I'hisinvention relates to nuclear-substituted phenylenediamine compounds and more particularly to phenylenediamine compounds in which the benzene rings are substituted in the meta position by a hydroxy-alkyl group and some of the hydrogen atoms in one of the amino groups replaced by various-substituents.

The novelty and advantages of our invention will be more apparent from the following brief consideration of, the state of the art. It is wellknown that the preparation of certain meta-substituted aryl compounds present difllculties, For example, it is known that when toluene is nitrated, the maximum yield of the meta-nitrotoluene is less than 6%. All of this meta-nitro-toluene probably would'not be recoverable. It is further apparent that if the meta-nitrotoluene were converted to the meta-.toluidine, a still further reduction in quantity might take place. Therefore, it can be seen from the commercial standpoint, that the supply of metaetoluidine is more or less limited to the demands for oand p-toluidine and to these compounds in relatively pure e Ol condition. For some purposes, since the meta compounds are present only in small amounts as derivatives are employed in the preparation of azo dyes, dyeing and other industrial purposes. With the rapidly increasing use of textile materials containing cellulose ester fibers dyed with the aforementioned type of dyestufis,'it is apparent thatthe demand for meta-toluidine compounds may exhaust the supply or otherwise adversely'affect the market. It is therefore readily apparent that the production of meta-substituted compounds which may be employed in place of meta-toluidine and similar compounds, and processes for the manufacture of such substituted compounds is a highlydesirable accomplishment.

We have found new meta-substituted compounds which may be quite readily prepared and whichare satisfactory for use in dye manufacture and for other purposes for which meta-toluidine has been employed. Our new compounds function satisfactorily and in many instances give superior results.

. unsubstituted alkyl, alkylene, cycloalkyl, aryl or heterocyclic groups, and R is hydrogen, an ester, or an ether group.

This invention has for one object to provide novel nuclear meta-substituted phenylenediamine compounds. Another object is to provide new compounds having the probable formula:

NH: E ;--CHr-OR I N (o opp) I where R is hydrogen, an ether or an organic or inorganic ester'group; R and R are hydrogen and substituted or unsubstituted alkyl, alkylene, aryl, cycloalkyl, or heterocyclic group.

R-O or R CHzOX where Ris a substituted or unsubstituted alkyl, alkylene, aryi, cycloalkyl or heterocyclic; R and B. may be in addition to R, hydrogen; X is hydrogen, ester or ether.

A still further object is to provide new compounds having the probable formula:

NH N

t \R, HOR

. v where R is an alkyl or substituted alkyl' or substituted alkyl group, R and R are substituted or Still another object is to employ the aforementioned compounds as intermediates for azo dyes, anth'raquinone dyes and indophenol dyes. A still further object is to employ the aforementioned novel compounds as photographic developers, both blackfand white and color.

Still another object is to provide a novel process Still another object is to provide-a novel process for preparing meta -amino benzyl alcohols and substitutedmeta amino benzo alcoholssuitable for. use in the production of our novel compounds aforementioned. Other objects will appear hereinafter.

Our invention may be generically illustrated to some extent by reference to the following series of formulas and reactions which broadly illustrate procedure by which the new compounds of this invention may he arrived at. .4101.

, CD101: H

Pressure temperature CHlOH detail hereinafter under VI-- qmon In step V suitable reactions have been referred to. For illustrating in further detail, reference is made to steps VI-IX, inclusive, which show procedure for obtaining our novel diamine compound. In considering these reactions it is pointed out, as above, that they are more or less presented for describing certain general aspects of our invention and additional details are set forth hereinafter.

fi e oalk lene oxides kyl h de alkyl alcohol+ VIII. 0 H10 R dehydration catalyst sets; 1 es NH] heterocyclie halides etc.

Suitable reaction to be desclbed in 25 In connection with Reactions VI and IX complete details are set forth in eopending application 147,641 new Patent No. 2,196,221, already referred to. Y

From the foregoing it can be seen that one general method for obtaining our new compounds may be considered as comprising the preparation of a benzyl alcohol compound and then converting the compound to our novel diamine. Further description of the preferred steps for obtaining benzyl alcohol compounds will be set forth hereinafter. However, in order to illustrate the preferred procedure for obtaining our new nuclear hydroxy alkyl phenylenediamine compounds the following detailed examples are set forth. The structure of the compounds which we produce may be represented by the following:

om-o a N (0 or p) R \RI where R is hydrogen, an ether or an organic or inorganic ester group; R and R. are hydrogen and substituted or unsubstituted alkyl, alkylene, aryl, cycloalkyl, or heterocyclic group.

Detailed procedure for obtaining such compounds is shown in the following examples:

Example 1 168 g. 3-amino-6-nitrobenzy1 alcohol, 500 cc. ethanol and 5 g. nickel from a nickel alloy are charged into an autoclave and hydrogenated at 2-200 atmospheres pressure and Elltemperature. When 3 moles of hydrogen have been absorbed, the reaction product is removed after HiOR nuclear hydroxy alkyl phenylenediamine a: x. N/ +HNOr N01 N/ n- \R' c ,on o 1011 N +HONO NO CHaOR cmon Then reduce as in VII.

XII.

c on

Then reduce as in VII.

CErOR oxide for l to hours.

cooling andworked up. The product has the formula NHQQNHI HIOH Eztample 2 NO CsHqOH EIOH and on reduction as in Example I we obtain:

CaB-cOH Example 3 186 g. o-chloroaniline are diazotized with aqueous sodium nitrite, for example, and coupled with 237 g.

N-CrHs iHiOH in cold dilute hydrochloric acid. The product which has the formula:

Cans

Cl I CifisOH CIIz-OS CH3 isthen reduced as in 1 giving a compound having the formula: V

l 1 CgHa Further description relative to Example 3 showing several suitable procedures of diazotization and other details are fully set forth in our co pending application 147,541, where examples are given for preparing compounds having the formula:

These compounds may be reduced as described in Examples 1 and 3 for obtaining our novel diamine compounds.

For further illustration a few examples aretaken from our copendlng application:

Example 4 v 17.2 grams of p-bromoaniline are dissolved in 150 cc. of water and cc. of 36% hydrochloric acid. The resulting solution is cooled by the adand the diazo solution prepared as described above-is added with stirring. The solutionisthen slowly neutralized to Congo red paper by the addition of sodium acetate. when coupling is complete. the dye compound formed is recovered v by filtration, wash'ed with water and dried. The compound formed has the formula:

Example p 15.1 grams of m-dimethylaminobenzyl alcohol' are dissolved in 100 cc. of glacial acetic acid and the resulting solution is cooled to a temperature approximating 0-10 C. by the additionof ice. A suitable diazo solution is added with stirring and the coupling reaction which takes place is completed by adding sodium acetate until the solution is neutral to Congo red paper. The compound formed is precipitated by the addition of water, filtered, washed with water and dried. The compound formed has the formula:

N0 N: N

CHa CH: HzOH The compounds produced in Examples 4 and 5 can be reduced in accordance with the procedure of Examples 1 and 3 and our diamine compound obtained.

In the aforementioned paragraphs we have described nuclear phenylenediamine derivatives having a CHzOR group. However, our invention is not limited to these exact compounds but embraces derivatives having a group such as CRHOR as well as nuclear substituted diamines having a plurality of groups such as R, R0, CR HOR, the latter group always being in the meta position. Further details respecting these other embodiments of our invention will be apparent from the description hereinafter.

In preparing these compounds meta-nitroacetophenone is obtained in some convenient manner (as for example by proceduresh'own in Organic Synthesis, 10, 74). This meta-nitroacetophenone may be reduced in any convenient manner to obtain m-aminophenyl methyl carbinol. After obtaining this alcoholic derivative of the aromatic compound it may be treated in a manner comparable to that already described.

where R and R" are hydrogen and substituted alkyl, cycloalkyl, heterocyclic, alkylene, or aromatic groups. I

XIV.

NHQ HNOa Nm Hon-cm cnon-cm XV. NO mp) OBOE-CHI xvi.

Reduce with H obtained chemically as Fe=HCl, catalytically as H-l-nickel catalyst.

NHFOIEN-m EOH-CH: Reduce as in XV.

xvn. a

\N NO:

Hon-cm Reduce as in XV.

xvm. B

R/ cnon on 3 Reduce as in XV. xix. R

HOE-CH:

Reduce as in XV.

xx. H

- N NO: H

CHOH-CH:

Alkylate, etc. then reduce as in XV.

The following specific examples are set forth for illustrating the preferred embodiments of procedure for carrying out the aforementioned type reaction where a diamine compound is obtained having the group CRHOR substituted in its nucleus:

' Example 6 HOHCHa U1 NHQNH: I HOCOCH:

' NH: C

no CH:

CH: HzNQNH:

H-S 03m Example 7 0 H30 NH:

circa-cm are hydrogenated as described in Example 6 to reduce the NO: to NI-Ia. In a similar manner we may prepare:

cm-o om HOE HOE-CH; lHOH-CH:

BIN

' Example 8 100 gm. CH:

Q CHa' HOE-CH:

are hydrogenated as described in Example 6 to reduce the NO to N'i-Iz.

Example 9 182 gm. omen-Giro,

' and 90 gm. ethylene oxide are heated in an auto- "clave at 100-200" for 1-7 hours.

The reaction product has the formula:

and is then hydrogenated as in Example 6 to re-- duce the N02 to NHz.

Our novel compositions may be still further modified by including a plurality of substituents, one being in the meta position, illustrations of which areas follows:

P-tolualdehyde is prepared in a suitable manner. One method may be generically illustrated as follows:

01130 CO CuzClz CHaO or CH: +HC1 C1013 0! CH3 CH0 This preparation is carried out with ease, and no pressure equipment is needed to carry out the reaction under super-atmospheric pressure conditions. The aldehyde is then nitrated to give CHaQCHO and is reduced by methods as already described.

The amino alcohol is alkylated after known methods or methods we have described above and a second amino group is introduced in general as follows: I

XXL NO:(0-0l p-) CH3 0H,ou+HN03- cm I cmon K! /N N Rt R! In place of CHswe may have C2H5, OCHs,

React with sum halides, alkyl sulfates, alkylene v -phosphate or derivative, benmate, etc. ether and cycioalkyl or heterocyclic.

' N0|(o,p)

xxn. 5 cQ-omomda) n IL i RI/ 1o Chemically with Fe+HCldiamine, catalytically with E l-nickel. a

XXIII.

Reduce as in m.

Reduce as in XXII.

. c cmon oxides, hydroxy alkyl halides, cyclo alkyiene oxides,

CI-CHz-CO-NHa. CI-CI-Iz-CO-OR, nrclm-ocne etc. Then reduce as in XXII.

As already indicated herein the sroupCHzOH may be esteriiled or etherified to give compounds having greater or lesser water solubility, depending upon the group added. Some of the ester groups that we may add are:

, -on., -cin'., rg-cunt. -on=cn- -on, so a.

groups wev may mention methyl, butyl, benzyl,

Iurfuryl, etc.

Further details respecting these modifications of our invention will be more apparent from the following specific examples:

Example 10 amass-1 OC:Hs. etc. it and B may be hydrogen substituted or unsubstituted alkyl, alkylene, aryl,

In a similar manner my rm:

cm. QCKQB on. Q oinoizem cmo Gone-column I i Na v imbue n .118 gm. S-amino-B-nitro bensyl alcohol a.

heated in an autoclave at 100-170' with gm. ethylene oxide for 1 to 5 hours. The reaction product has the formula:

' .cimon j In a similar manner we may prepare:

I Example-12" 126 m; o-chloroaniline are diazotized in the usual manner and coupled with 250 gm.

cm 0 cmon cmo omm CsHa in cold dilute hydrochloric acid. Coupling is completed by adding sodium acetate. In a similar manner other derivatives of this series are pre- Eaiample 13 100 grit. of the diazo derivative of Example 12 are-charged into an autoclave and hydrogenated as described in Example 10. When 2 moles of hydrogen have been absorbed the reaction is complete. The reaction product has the formula:

CHaOH Similarly, we may prepare:

NH: CHaOOCHz-OCH: (mm

CH3 CHaOH,

CzHs CHaOH CH: CHzOH N (CzHiO CH3):

CHzOH We have generically and specifically illustrated our new compounds and th'eir methods of manufacture. These new meta-substituted aryl compounds may be employed in place of meta-toluidine compounds in dyes, dye manufacture, and

for photographic and pharmaceutical purposes.

We have found that our novel nuclear hydroxy alkyl phenylenediamine derivatives described herein are particularly useful for photographic purposes. Certain of these derivatives are useful not onl for. black and white developers but may also be used for color developers, couplers and other purposes in connection with color photo raphy.

The nickel catalyst employed in many of the examples herein set worth was obtained from a nickel compound such as nickel silicon or nickel aluminum, the other constituents being dissolved away from the nickel to obtain a finely divided active nickel. However, our invention is not limited in this respect inasmuch as we may employ various other catalysts. We may use any of the older known catalytic preparations such as nickel on kieselguhr, prepared-by any known means; nickel oxide,- prepared by any known method; metallic nickel; the various noble metal catalysts, prepared from platinum, palladium, etc.; metallic catalysts such as copper, iron oxides, tin, etc. Certain newer catalysts are very good for the preparation of these compounds such as copper chromite, zinc chromium oxide, Raney nickel, Adams" platinum oxide, etc. In general, we may use one or more of the various types of catalysts described in "Hydrogenation of Organic Substances" by Carleton Ellis or any of th'e more recent modifications of these older catalysts.

We have found a novel method of producing benzyl alcohol which is readily illustrated by the following examples:

Example 14 Example 15 gr. 3-nitro-4-methyl benzyl alcohol, 200cc. ethyl acetate and 4 gr. copper chromite are charged into an autoclave as in Example 14. The resulting alcohol is worked up as in Example 14. In a similar manner there may be prepared CHaO CHzOH 02H; CHaOH NH: G 3 1 NH:

Example 16 100 gr. 3-nitro-4-ethyl benzyl alcohol, 300 cc. ethyl acetate and 1 gr. platinum oxide are shaken in a pressure bottle until th'e correct amount of etc.

2,27a5e4 hydrogen has been absorbed. The reaction prodacts are removed andworkedup as before.

' Example 17 100 gr. m-nitro benzaldehyde, 200 cc. ethanol and 10 gr. Raney nickel are shaken in an autoclave with hydrogen at 160-175 (125 at. pros Example 18 100 gr. m-nitro benzaldehyde, 65 gr, acetic anhydride; 200 cc. ethyl acetate and 5 gr. Raney nickel are hydrogenated as in Example 14.

- Th'ere is obtained a good yield of v CHr-O q-GH:

which may be hydrolyzed by known means to give the desired m-amino benzyl'alcohol.

Example 19 160 gr. 3-nitro-4-ethyl benzaldehyde, 300 cc. alcohol saturated with hydrogen chloride and 1 gr. platinum oxide are reacted as in Example 16. There is obtained a good yield of Qmzmm CHI-H While we have illustrated a number of modifications of our invention it is to be understood that there are still further compounds which can be prepared by procedure the same or similar to i that we have described. The extent of our invention will be further illustrated by the following compounds:

(1) Nfi -QNH:

mo on;

m-oc 0H3 (5) HzN- N-CH r-CH-CHaOH 6H HQOH v a M M V C Hw I mon.

.MQ a nu ne-o'cnr-cm'on,

Gilli-00 'QII:

H -UcHu etc.

0 Qon CHaOlI Gen;

etc.

CHaOH I HzN N CHOH 0 :0 "on, I

' HaDH 1N N C IOH CIHIOH CHzOH or CHr-8-OH H C t-N NHI HzOH C4110 24 HN N on CUT-C C :OH

; V C(Hs (2 IIN CHzCNH: H20 PNa A V r OCH: (34H:

(26) H:N- N

0 ,OH I

(27) /N- NH:

HOC'CHa H:

CH: HOCzHI (28) N NH:

ONa HOCZHI H-O-P\ $sHn 0N3 CzH4-O C-CH: O (29) HsN N\ CgHr-O8-CHI (EH-002E011 on c OCH 2-- a ll (30) HsN O CH C-OCH non "n b 0 OCH:

CHs-CH 00m 31 H2N N /OCH: non-on, cal-on OCH: v CH2CCH: I (32) HzN N O CH:CCH3

CHOHCHa 0 I /CH:CHzS0;Na (33) HzN N\ Clo al HOE CH:-CHI

OH:- H H:

The aforementioned compounds as already indicated, may be employed in the dye industries,

employed as couplersand for other purposes in color photography aswell as black and white.

7 Also,certain of the compounds are useful as rubbe carried out on a large scale and furnish an attractive source of meta-compounds which not only may be substituted for meta-toluidine compounds but are competitive therewith at the presphotographic industries and pharmaceutical industries and for other purposes. For example, the aforementioned compounds are useful as intermediates in the preparation of indophenol dyes, azo dyes, anthraquinone dyes. The compounds may be employed as photographic developers and as pointed out, the compounds may be ent prices.

Other advantages of our invention will be ap- 4 parent to those skilled in the art.

Hence, we do not wish to be restricted therein, excepting insofar as is necessitated by the prior art and the spirit of the appended claims.

What weclaim and desire to be secured by Letters Patent of the United States is:

1. A compound having the formula:

alkyl HsN N\ alkyl H0 R:

l R4 wherein R is 'a member from the group consisting of hydrogen, alkyl, hydroxya-lkyl, carboxylic acid aeyl and R is a member from the group consisting of hydrogen, alkyl,- and alkoxy alkyl.

2. A compound havingthe formula:

lim

Ha v wherein R is a member from the group consisting of hydrogen, alkyl, hydroxy alkyl, and carboxylic acid acyl.

3. A compound having the formula:

mN N

\R. 11.0 alkyl wherein R is a member from the group consisting of hydrogen, alkyl, hydroxy alkyl, and alkoxy alkyl and R. is a member from the group consisting of hydrogen, alkyl, hydroxy alkyl, alkoxy alkyl, and lower aliphatic carboxy oxyalkyl.

4. A compound useful as a photographic developer in color photography, having the formula:-

CHO R! wherein R is a member from the group consistethyl 1125' N 1 alkyl' (31320111 7. A compound having the formula:

alkyl hydroxy N CH R alkyl hydroxy wherein R. is a member from the group consisting of hydrogen, alkyl, hydroxy-alkyi, carboxylic acid acyl and R is a. member from the group consisting of hydrogen, alkyl, and alkoxy alkyl.

8. A compound capable of use as a photographic developer having the formula:

wherein R. is a member from the group consisting of hydrogen, alkyl, hydroxy alkyl, a1- koxy alkyl, and lower aliphatic carboxy oxyalkyl, R is a member from the group consisting of hydrogen, alkyl, hydroxy alkyl, carboxylic acid acyl, and R is a member from the group consisting of hydrogen, alkyl, and alkoxy alkyl.

9. The process which comprises hydrogenatinga compound having the formula:

- acyl, andR* is a member from the group consisting of hydrogen, alkyl, and alkoxy alkyl, at a pressure between 2 and 200 atmospheres and a temperature between 20 C.-and C. in the presence of a hydrogenation catalyst.

10. The process which comprises hydrogenating a compound having the formula:

in -n wherein R is a member from the groupconsisting of hydrogen, alkyl, hydroxy alkyl, and alkoxy alkyl, R is a member from the group consisting of hydrogen, alkyl, hydroxy alkyl, alkoxy alkyl, and lower aliphatic carboxy oxyalkyl, R. is a member from the group consisting of hydrogen, alkyl, hydroxy alkyl, carboxylic acid acyl, R is a member from the group consisting of hy drogen, alkyl, and alkoxy alkyl, and X represents a reducible member from the group consisting of azo and nitro at a pressure between 2 and 200 atmospheres and a temperature between 20 C. and 150 C. in the presence of a hydrogenation catalyst.

- JOSEPH B. DICKEY.

JAMES G. MoNALLY. 

